/* =========================================================================
   Tideway 官网 — 设计系统
   品牌 token 复用客户端 src/index.css：橙色主色 #ff9500 + Apple-HIG 中性灰。
   零依赖：纯手写现代 CSS，无框架。
   ========================================================================= */

:root {
  /* 品牌色 —— 与客户端一致 */
  --tw-accent-soft: #fff3e0;
  --tw-accent-bg: #ffe0b2;
  --tw-accent: #ff9500;
  --tw-accent-hover: #e68600;
  --tw-accent-deep: #bf7000;
  --tw-accent-bright: #ffab40;

  /* 中性 —— Apple HIG */
  --warm-00: #ffffff;
  --warm-01: #f5f5f7;
  --warm-015: #f2f2f7;
  --warm-02: #e5e5ea;
  --warm-03: #d1d1d6;
  --warm-05: #aeaeb2;
  --warm-06: #6e6e73;
  --warm-08: #3a3a3c;
  --warm-09: #1d1d1f;

  --ink: #1d1d1f;
  --ink-soft: #4b4b4f;
  --ink-muted: #6e6e73;
  --label: var(--ink);
  --ink-secondary: var(--ink-soft);

  /* 深色 CTA 渐变 —— 与客户端「进入工作区」一致 */
  --btn-dark: linear-gradient(180deg, #2c2c2e 0%, #1d1d1f 55%, #111113 100%);
  --btn-dark-hover: linear-gradient(180deg, #3a3a3c 0%, #2c2c2e 55%, #1d1d1f 100%);

  /* Typography: system font stack only, no bundled Apple font files. */
  --font-ui: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Segoe UI", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display",
    "SF Pro Text", "PingFang SC", "Segoe UI", "Microsoft YaHei",
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas,
    monospace;

  --text-xs: 12px;
  --text-sm: 13px;
  --text-body: 14px;
  --text-body-lg: 16px;
  --text-title-sm: 18px;
  --text-title: 22px;
  --text-display-sm: 32px;
  --text-display: 44px;
  --text-hero: 56px;

  --type-hero: var(--text-hero);
  --type-section-title: var(--text-display);
  --type-compact-title: var(--text-display-sm);
  --type-metric: var(--text-display-sm);

  --leading-tight: 1.15;
  --leading-title: 1.2;
  --leading-ui: 1.35;
  --leading-body: 1.6;

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* 半径 / 阴影 */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06), 0 12px 40px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08), 0 30px 90px rgba(0, 0, 0, 0.10);
  --shadow-accent: 0 8px 24px rgba(255, 149, 0, 0.28);
  --shadow-window: 0 24px 80px rgba(29, 29, 31, 0.16);

  /* macOS 27 web approximation semantic tokens */
  --surface: #f0f2f8;
  --surface-elevated: rgba(255, 255, 255, 0.90);
  --surface-solid: #ffffff;
  --surface-glass: rgba(255, 255, 255, 0.76);
  --surface-glass-strong: rgba(255, 255, 255, 0.88);
  --separator: rgba(60, 60, 67, 0.14);
  --separator-strong: rgba(60, 60, 67, 0.24);
  --focus-ring: var(--tw-accent);
  --glass-blur: 28px;

  /* macOS 27 secondary palette — blue/indigo accent for gradients */
  --blue-300: #90baff;
  --blue-400: #5294ff;
  --blue-500: #3478f6;
  --blue-soft: #e8f0ff;
  --indigo-300: #b8a0ff;
  --indigo-400: #8f66ff;

  --maxw: 1180px;
  --nav-h: 64px;
}

html[data-theme="dark"] {
  --warm-00: #1d1d1f;
  --warm-01: #242426;
  --warm-015: #2c2c2e;
  --warm-02: #3a3a3c;
  --warm-03: #48484a;
  --warm-05: #8e8e93;
  --warm-06: #aeaeb2;
  --warm-08: #f2f2f7;
  --warm-09: #f5f5f7;
  --ink: #f5f5f7;
  --ink-soft: #d1d1d6;
  --ink-muted: #aeaeb2;
  --surface: #18181a;
  --surface-elevated: rgba(44, 44, 46, 0.88);
  --surface-solid: #2c2c2e;
  --surface-glass: rgba(44, 44, 46, 0.76);
  --surface-glass-strong: rgba(54, 54, 58, 0.88);
  --separator: rgba(235, 235, 245, 0.16);
  --separator-strong: rgba(235, 235, 245, 0.28);
  --shadow-window: 0 24px 80px rgba(0, 0, 0, 0.42);
}

/* dark-mode overrides for hardcoded gradient surfaces */
html[data-theme="dark"] .hero {
  background:
    radial-gradient(ellipse 75% 60% at 78% -8%,  rgba(52, 120, 246, 0.30), transparent 65%),
    radial-gradient(ellipse 55% 45% at 96% 62%,  rgba(143, 102, 255, 0.16), transparent 56%),
    radial-gradient(ellipse 48% 42% at 5%  38%,  rgba(255, 149, 0,   0.14), transparent 58%),
    linear-gradient(170deg, #0a101e 0%, #0f1018 45%, #18181a 100%);
}
html[data-theme="dark"] .dl-hero,
html[data-theme="dark"] .about-hero {
  background:
    radial-gradient(ellipse 60% 50% at 78% -12%, rgba(52, 120, 246, 0.22), transparent 62%),
    radial-gradient(ellipse 40% 38% at 8%  40%,  rgba(255, 149, 0,  0.10), transparent 55%),
    linear-gradient(180deg, #090e1a 0%, #18181a 72%);
}
html[data-theme="dark"] .nav {
  background: rgba(24, 24, 26, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.30), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
html[data-theme="dark"] .trust {
  background: rgba(36, 36, 38, 0.76);
  border-top:    1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
html[data-theme="dark"] .hero__pill {
  background: rgba(44, 44, 46, 0.82);
  border-color: rgba(255, 255, 255, 0.14);
  color: var(--blue-300);
  box-shadow: 0 2px 12px rgba(52, 120, 246, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.10);
}
html[data-theme="dark"] .feature {
  background: rgba(44, 44, 46, 0.82);
  border-color: rgba(255, 255, 255, 0.10);
}
html[data-theme="dark"] .pricing-card {
  background: rgba(44, 44, 46, 0.88);
  border-color: rgba(255, 255, 255, 0.10);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

html[data-contrast="more"] {
  --ink-soft: var(--ink);
  --ink-muted: var(--ink);
  --separator: var(--separator-strong);
  --focus-ring: #0a84ff;
}

/* ------------------------------------------------------------------ reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}
body {
  margin: 0;
  font-family: var(--font-ui);
  font-size: var(--text-body-lg);
  font-weight: var(--weight-regular);
  color: var(--ink);
  background: var(--surface);
  line-height: var(--leading-body);
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
h1,
h2,
h3,
h4,
p {
  margin: 0;
  letter-spacing: 0;
}
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
}
button {
  font-family: inherit;
  cursor: pointer;
}
input,
select {
  font-family: inherit;
}
/* 键盘焦点可见性（A11y），仅键盘触发、不影响鼠标点击 */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ----------------------------------------------------------------- layout */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}
.container--narrow {
  max-width: 820px;
}
.section {
  padding: 96px 0;
}
.section--tight {
  padding: 64px 0;
}
.section-head {
  max-width: 680px;
  margin: 0 auto 56px;
  text-align: center;
}
.section-head--left {
  text-align: left;
  max-width: none;
}
.section-head--compact {
  margin-bottom: 20px;
}
.surface-band {
  background: var(--warm-01);
}
.eyebrow {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--tw-accent-deep);
  background: var(--tw-accent-soft);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.section-title {
  font-size: var(--type-section-title);
  font-weight: var(--weight-bold);
  letter-spacing: 0;
  line-height: var(--leading-title);
}
.section-title--compact {
  font-size: var(--text-display-sm);
  margin-bottom: 16px;
}
.section-sub {
  margin-top: 16px;
  font-size: var(--text-title-sm);
  line-height: var(--leading-body);
  color: var(--ink-muted);
}
.section-sub--narrow {
  margin-left: auto;
  margin-right: auto;
  max-width: 560px;
}
.copy-block {
  color: var(--ink-soft);
  font-size: var(--text-body-lg);
  line-height: var(--leading-body);
}
.copy-block + .copy-block {
  margin-top: 16px;
}
.muted-loading {
  color: var(--ink-muted);
  padding: 20px;
}

/* --------------------------------------------------------------- buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-ui);
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease,
    border-color 0.2s ease;
  white-space: nowrap;
}
.btn:active {
  transform: translateY(1px);
}
.btn--primary {
  color: #fff;
  background: var(--btn-dark);
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover {
  background: var(--btn-dark-hover);
  box-shadow: var(--shadow-md);
}
.btn--accent {
  color: #fff;
  /* 下沉渐变以满足白字 AA 对比；浅色起点仅 8% 保留光泽 */
  background: linear-gradient(180deg, var(--tw-accent) 0%, var(--tw-accent-hover) 55%, var(--tw-accent-deep) 100%);
  box-shadow: var(--shadow-accent);
  text-shadow: 0 1px 1px rgba(120, 60, 0, 0.35);
}
.btn--accent:hover {
  filter: brightness(1.04);
  box-shadow: 0 10px 30px rgba(255, 149, 0, 0.36);
}
.btn--ghost {
  color: var(--ink);
  background: var(--surface-elevated);
  border-color: var(--separator);
}
.btn--ghost:hover {
  background: var(--surface-solid);
  border-color: var(--separator-strong);
}
.btn--lg {
  font-size: var(--text-body-lg);
  padding: 16px 30px;
}
.btn__icon {
  width: 18px;
  height: 18px;
}
.btn__sub {
  font-weight: var(--weight-regular);
  opacity: 0.7;
  font-size: var(--text-xs);
  margin-left: 2px;
}

/* -------------------------------------------------------------------- nav
   Liquid Glass approximation: stronger blur + brightness lift +
   inner highlight on top edge. Opaque fallback via data-transparency. */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(240, 242, 248, 0.80);
  backdrop-filter: saturate(200%) blur(32px) brightness(1.03);
  -webkit-backdrop-filter: saturate(200%) blur(32px) brightness(1.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.60);
  box-shadow: 0 1px 0 rgba(60, 60, 67, 0.10), inset 0 1px 0 rgba(255, 255, 255, 0.72);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: var(--weight-bold);
  font-size: var(--text-body-lg);
  letter-spacing: 0;
}
.brand__mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__links a {
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  line-height: var(--leading-ui);
  color: var(--ink-soft);
  transition: color 0.15s ease;
}
.nav__links a:hover {
  color: var(--ink);
}
.nav__links a.is-active {
  color: var(--ink);
  font-weight: var(--weight-semibold);
}
.nav__cta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav__burger {
  display: none;
  background: none;
  border: none;
  padding: 8px;
}
.nav__burger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}
.nav__burger span + span {
  margin-top: 5px;
}

/* ------------------------------------------------------------------- hero
   Derived approximation of macOS 27 Liquid Glass wallpaper depth:
   blue-indigo sweep upper-right, orange brand anchor lower-left,
   warm off-white canvas—no single colour dominates. */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 75% 60% at 78% -8%,  rgba(82, 148, 255, 0.28), transparent 65%),
    radial-gradient(ellipse 55% 50% at 96% 62%,  rgba(143, 102, 255, 0.12), transparent 56%),
    radial-gradient(ellipse 48% 42% at 5%  38%,  rgba(255, 149, 0,   0.18), transparent 58%),
    radial-gradient(ellipse 30% 28% at 45% 92%,  rgba(255, 120, 40,  0.08), transparent 52%),
    linear-gradient(170deg, #e8efff 0%, #eff1f8 45%, var(--surface) 100%);
  padding: 88px 0 72px;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
.hero__pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--blue-500);
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px) saturate(180%) brightness(1.04);
  -webkit-backdrop-filter: blur(20px) saturate(180%) brightness(1.04);
  box-shadow: 0 2px 12px rgba(52, 120, 246, 0.10), inset 0 1px 0 rgba(255,255,255,0.9);
  padding: 7px 14px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero__pill .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue-400);
  box-shadow: 0 0 0 4px rgba(82, 148, 255, 0.22);
}
.hero h1 {
  font-size: var(--type-hero);
  line-height: var(--leading-tight);
  letter-spacing: 0;
  font-weight: var(--weight-bold);
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--tw-accent) 0%, var(--tw-accent-deep) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__sub {
  margin-top: 22px;
  font-size: var(--text-title-sm);
  line-height: var(--leading-body);
  color: var(--ink-soft);
  max-width: 520px;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}
.hero__meta {
  margin-top: 22px;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: var(--text-sm);
  line-height: var(--leading-ui);
  color: var(--ink-muted);
}
.hero__meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

/* ------------------------------------------------- 产品 UI 复刻（mock 窗口）
   Derived approximation of macOS 27 window chrome: stronger glass,
   layered shadow depth, inset highlight on top edge. */
.mock {
  position: relative;
  border-radius: var(--r-lg);
  background: rgba(248, 250, 255, 0.92);
  backdrop-filter: blur(32px) saturate(180%);
  -webkit-backdrop-filter: blur(32px) saturate(180%);
  box-shadow:
    0 30px 100px rgba(29, 29, 31, 0.20),
    0 8px 32px rgba(29, 29, 31, 0.10),
    inset 0 1px 0 rgba(255, 255, 255, 0.90);
  border: 1px solid rgba(255, 255, 255, 0.65);
  overflow: hidden;
  transform: perspective(1600px) rotateY(-7deg) rotateX(2deg);
}
.mock__bar {
  height: 40px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 14px;
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.50);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
}
.mock__bar i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--warm-03);
}
.mock__bar i:nth-child(1) {
  background: #ff5f57;
}
.mock__bar i:nth-child(2) {
  background: #febc2e;
}
.mock__bar i:nth-child(3) {
  background: #28c840;
}
.mock__bar b {
  margin-left: 10px;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--ink-muted);
}
.mock__body {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 14px;
  padding: 16px;
  min-height: 320px;
  background:
    radial-gradient(circle at 1px 1px, rgba(82, 148, 255, 0.07) 1px, transparent 0)
      0 0 / 22px 22px,
    linear-gradient(170deg, rgba(220, 232, 255, 0.30) 0%, #f0f2f8 100%);
}
.wf-card {
  background: var(--surface-elevated);
  border: 2px solid var(--tw-accent);
  border-radius: var(--r-md);
  padding: 14px;
  box-shadow: var(--shadow-sm);
}
.wf-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.wf-card__ico {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--tw-accent-soft);
  display: grid;
  place-items: center;
  font-size: var(--text-title-sm);
}
.wf-card__head b {
  font-size: var(--text-body);
  line-height: var(--leading-ui);
}
.wf-card__head small {
  display: block;
  font-size: var(--text-xs);
  color: var(--ink-muted);
  font-weight: var(--weight-regular);
}
.wf-slots {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.wf-slot {
  aspect-ratio: 3 / 4;
  border-radius: 10px;
  background: repeating-linear-gradient(
    -45deg,
    var(--warm-01),
    var(--warm-01) 7px,
    #fff 7px,
    #fff 14px
  );
  border: 1px solid var(--warm-02);
  position: relative;
}
.wf-slot--a {
  background: linear-gradient(160deg, #ffe6c2, #ffd29b);
}
.wf-slot--b {
  background: linear-gradient(160deg, #d8e9ff, #bcd6ff);
}
.wf-run {
  margin-top: 12px;
  height: 38px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--tw-accent-bright), var(--tw-accent));
  color: #fff;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-accent);
}
.mock__result {
  border-radius: var(--r-md);
  background: linear-gradient(170deg, #efe7df 0%, #e3d6c8 100%);
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: end center;
}
/* 抽象服装剪影，让"合成结果"更像出图而非纯色块（贴合服装 AI 主题） */
.mock__result::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2%;
  width: 50%;
  height: 82%;
  transform: translateX(-50%);
  background: linear-gradient(180deg, #9aa0a8 0%, #6b7079 70%, #565b63 100%);
  clip-path: polygon(
    40% 0, 60% 0, 70% 12%, 60% 20%, 80% 52%, 71% 100%, 29% 100%, 20% 52%, 40% 20%, 30% 12%
  );
  opacity: 0.82;
}
.mock__result::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(50% 38% at 50% 30%, rgba(255, 255, 255, 0.55), transparent),
    linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.08));
}
.mock__result span {
  position: relative;
  z-index: 1;
  margin-bottom: 14px;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: #fff;
  background: rgba(0, 0, 0, 0.45);
  padding: 4px 12px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* --------------------------------------------------------------- 信任条
   Derived approximation: glass strip floats between hero and features. */
.trust {
  border-top: 1px solid rgba(255, 255, 255, 0.60);
  border-bottom: 1px solid var(--separator);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
}
.trust__row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 40px 0;
  text-align: center;
}
.trust__num {
  font-family: var(--font-display);
  font-size: var(--type-metric);
  font-weight: var(--weight-bold);
  letter-spacing: 0;
  line-height: var(--leading-tight);
  color: var(--ink);
}
.trust__lbl {
  margin-top: 8px;
  font-size: var(--text-body);
  color: var(--ink-muted);
}

/* --------------------------------------------------------------- features
   Cards use Liquid Glass approximation: translucent glass + inner highlight.
   Hover lifts with subtle blue-tinted shadow. */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.feature {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(255, 255, 255, 0.70);
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.90);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  transition: transform 0.28s cubic-bezier(0.22, 0.61, 0.36, 1),
    box-shadow 0.28s ease, border-color 0.2s ease;
}
.feature:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md), 0 0 0 1px rgba(82, 148, 255, 0.14), inset 0 1px 0 rgba(255, 255, 255, 0.90);
  border-color: rgba(82, 148, 255, 0.22);
}
.feature__ico {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: var(--text-title);
  background: linear-gradient(160deg, var(--tw-accent-soft), #fff);
  border: 1px solid var(--tw-accent-bg);
  margin-bottom: 18px;
}
.feature__ico svg {
  width: 26px;
  height: 26px;
  stroke: var(--tw-accent-deep);
}
/* 演示步骤序号：圆形，区别于功能图标的圆角方块 */
.step-num {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  margin: 0 auto 18px;
  font-size: var(--text-title);
  font-weight: var(--weight-bold);
  color: var(--tw-accent-deep);
  background: linear-gradient(160deg, var(--tw-accent-soft), #fff);
  border: 1px solid var(--tw-accent-bg);
}
.feature h3 {
  font-size: var(--text-title-sm);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-title);
  letter-spacing: 0;
}
.feature p {
  margin-top: 10px;
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--ink-muted);
}
.feature--wide {
  grid-column: span 3;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 30px;
  padding: 36px;
  background: linear-gradient(135deg, #1d1d1f 0%, #2c2c2e 100%);
  color: #fff;
  border: none;
}
.feature--wide h3 {
  font-size: var(--text-title);
}
.feature--wide p {
  color: rgba(255, 255, 255, 0.72);
  font-size: var(--text-body-lg);
}
.feature--wide .chat-mock {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--r-md);
  padding: 18px;
}
.chat-mock .bubble {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: var(--text-sm);
  line-height: var(--leading-ui);
  margin-bottom: 10px;
  max-width: 85%;
}
.chat-mock .bubble--user {
  background: var(--tw-accent);
  color: #fff;
  margin-left: auto;
  border-bottom-right-radius: 4px;
}
.chat-mock .bubble--ai {
  background: rgba(255, 255, 255, 0.1);
  border-bottom-left-radius: 4px;
}

/* -------------------------------------------------------------- scenarios */
.scenarios {
  background: var(--surface);
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.scenario {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--surface-elevated);
  border: 1px solid var(--separator);
  box-shadow: var(--shadow-sm);
}
.scenario__img {
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  letter-spacing: 0;
  position: relative;
}
.scenario__img--1 {
  background: linear-gradient(140deg, #ffd3a0 0%, #ff9a60 55%, #ff7a40 100%);
}
.scenario__img--2 {
  background: linear-gradient(140deg, #90c0ff 0%, #5294ff 55%, #3468e0 100%);
}
.scenario__img--3 {
  background: linear-gradient(140deg, #a8e6c4 0%, #5ec494 55%, #3aad78 100%);
}
.scenario__body {
  padding: 22px 24px 26px;
}
.scenario__body h3 {
  font-size: var(--text-title-sm);
}
.scenario__body p {
  margin-top: 8px;
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--ink-muted);
}

/* ------------------------------------------------------------- download CTA
   Deep space dark + blue & orange halo — derived from macOS 27 dark palette. */
.dl-cta {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 55% 65% at 82% 18%, rgba(82, 148, 255, 0.22), transparent 60%),
    radial-gradient(ellipse 40% 40% at 14% 78%, rgba(255, 149, 0,   0.16), transparent 52%),
    radial-gradient(ellipse 30% 30% at 50% 50%, rgba(143, 102, 255, 0.06), transparent 55%),
    linear-gradient(135deg, #080810 0%, #0e0e1a 45%, #12100a 100%);
  color: #fff;
  border-radius: var(--r-xl);
  padding: 60px;
  text-align: center;
}
.dl-cta h2 {
  font-size: var(--type-compact-title);
  font-weight: var(--weight-bold);
  letter-spacing: 0;
  line-height: var(--leading-title);
}
.dl-cta p {
  margin: 16px auto 0;
  max-width: 560px;
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-body-lg);
}
.dl-cta__btns {
  margin-top: 32px;
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.dl-cta__note {
  margin-top: 18px;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
}

/* ----------------------------------------------------------- download page */
.dl-hero {
  padding: 72px 0 32px;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 50% at 78% -12%, rgba(82, 148, 255, 0.20), transparent 62%),
    radial-gradient(ellipse 40% 38% at 8%  40%,  rgba(255, 149, 0,  0.12), transparent 55%),
    linear-gradient(180deg, #e6eeff 0%, var(--surface) 72%);
}
.dl-latest {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-top: 8px;
}
.dl-card {
  position: relative;
  border-radius: var(--r-lg);
  border: 1px solid var(--separator);
  background: var(--surface-elevated);
  box-shadow: var(--shadow-sm);
  padding: 30px;
  text-align: left;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.dl-card--primary {
  border-color: var(--tw-accent);
  box-shadow: 0 0 0 3px rgba(255, 149, 0, 0.12), var(--shadow-md);
}
.dl-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.dl-card__os {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.dl-card__os svg {
  width: 34px;
  height: 34px;
}
.dl-card__os h3 {
  font-size: var(--text-title-sm);
  line-height: var(--leading-title);
}
.dl-card__os small {
  display: block;
  font-size: var(--text-sm);
  color: var(--ink-muted);
  font-weight: var(--weight-regular);
}
.badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0;
}
.badge--latest {
  color: #fff;
  /* 下沉至 deep 以满足白字 AA（白 / #bf7000 ≈ 4.6:1） */
  background: var(--tw-accent-deep);
}
.badge--soft {
  color: var(--tw-accent-deep);
  background: var(--tw-accent-soft);
}
.badge--muted {
  color: var(--ink-muted);
  background: var(--warm-02);
}
.dl-card__meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: var(--text-sm);
  line-height: var(--leading-ui);
  color: var(--ink-muted);
  margin: 4px 0 20px;
}
.dl-card .btn {
  width: 100%;
}
.dl-current-os {
  position: absolute;
  top: 18px;
  right: 18px;
}
.version-current {
  font-size: var(--text-body);
  font-weight: var(--weight-bold);
  line-height: var(--leading-ui);
}

/* 安装指引 / 折叠 */
.acc {
  border: 1px solid var(--separator);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--surface-elevated);
}
.acc + .acc {
  margin-top: 12px;
}
.acc > summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 22px;
  font-weight: var(--weight-semibold);
  font-size: var(--text-body-lg);
  line-height: var(--leading-ui);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.acc > summary::-webkit-details-marker {
  display: none;
}
.acc > summary::after {
  content: "";
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--ink-muted);
  border-bottom: 2px solid var(--ink-muted);
  transform: rotate(45deg);
  transition: transform 0.22s ease;
  margin-top: -4px;
}
.acc[open] > summary::after {
  transform: rotate(-135deg);
  margin-top: 2px;
}
.acc__body {
  padding: 0 22px 20px;
  color: var(--ink-soft);
  font-size: var(--text-body);
  line-height: var(--leading-body);
}
.acc__body ol,
.acc__body ul {
  margin: 0;
  padding-left: 20px;
}
.acc__body li {
  margin: 6px 0;
}

/* 历史版本 */
.history-title {
  font-size: var(--text-title);
  font-weight: var(--weight-bold);
  letter-spacing: 0;
  line-height: var(--leading-title);
}
.history-sub {
  color: var(--ink-muted);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  margin-top: 6px;
}
.history {
  margin-top: 16px;
  border: 1px solid var(--separator);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--surface-elevated);
}
.hist-row {
  padding: 20px 24px;
  border-top: 1px solid var(--separator);
}
.hist-row:first-child {
  border-top: none;
}
.hist-row__head {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.hist-row__ver {
  font-size: var(--text-body-lg);
  font-weight: var(--weight-bold);
  letter-spacing: 0;
}
.hist-row__date {
  font-size: var(--text-sm);
  color: var(--ink-muted);
}
.hist-row__dls {
  margin-left: auto;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.hist-dl {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--ink);
  border: 1px solid var(--separator-strong);
  background: var(--surface-solid);
  padding: 8px 14px;
  border-radius: 999px;
  display: inline-flex;
  gap: 7px;
  align-items: center;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.hist-dl:hover {
  background: var(--warm-01);
  border-color: var(--ink-muted);
}
.hist-dl small {
  color: var(--ink-muted);
  font-weight: var(--weight-regular);
}
.hist-row__log {
  margin-top: 10px;
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--ink-muted);
}
.hist-row__log ul {
  margin: 6px 0 0;
  padding-left: 18px;
}
.hist-sha {
  margin-top: 8px;
  font-size: var(--text-xs);
  color: var(--warm-05);
  font-family: var(--font-mono);
  word-break: break-all;
}
.history__more {
  display: block;
  width: 100%;
  text-align: center;
  padding: 16px;
  font-weight: var(--weight-semibold);
  font-size: var(--text-body);
  color: var(--tw-accent-deep);
  background: var(--warm-01);
  border: none;
  border-top: 1px solid var(--warm-02);
}
.history__more:hover {
  background: var(--tw-accent-soft);
}

/* ------------------------------------------------------------------ about */
.about-hero {
  padding: 80px 0 40px;
  background:
    radial-gradient(ellipse 55% 50% at 75% -10%, rgba(82, 148, 255, 0.18), transparent 60%),
    radial-gradient(ellipse 40% 35% at 5%  40%,  rgba(255, 149, 0,  0.12), transparent 55%),
    linear-gradient(180deg, #e6eeff 0%, var(--surface) 72%);
}
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 8px;
}
.value {
  padding: 28px;
  border-radius: var(--r-lg);
  background: var(--surface-elevated);
  border: 1px solid var(--separator);
}
.value h3 {
  font-size: var(--text-title-sm);
  margin-bottom: 8px;
}
.value p {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--ink-muted);
}
.contact-card {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}
.contact-item {
  padding: 22px 24px;
  border-radius: var(--r-md);
  border: 1px solid var(--separator);
  background: var(--surface-elevated);
}
.contact-item small {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0;
  color: var(--ink-muted);
}
.contact-item p {
  margin-top: 6px;
  font-size: var(--text-body-lg);
  font-weight: var(--weight-semibold);
}
.contact-note {
  color: var(--ink-muted);
  font-size: var(--text-sm);
  font-weight: var(--weight-regular);
}

/* --------------------------------------------------------------- legal/doc */
.doc {
  max-width: 780px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}
.doc h1 {
  font-size: var(--text-display-sm);
  font-weight: var(--weight-bold);
  letter-spacing: 0;
  line-height: var(--leading-title);
}
.doc .doc__meta {
  color: var(--ink-muted);
  font-size: var(--text-body);
  margin: 12px 0 36px;
}
.doc h2 {
  font-size: var(--text-title);
  margin: 36px 0 12px;
}
.doc p {
  color: var(--ink-soft);
  margin: 12px 0;
}
.doc ul {
  color: var(--ink-soft);
}
.callout {
  border-left: 3px solid var(--tw-accent);
  background: var(--tw-accent-soft);
  padding: 14px 18px;
  border-radius: 0 10px 10px 0;
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--ink-soft);
  margin: 20px 0;
}

/* ----------------------------------------------------------------- footer */
.footer {
  background: #1d1d1f;
  color: rgba(255, 255, 255, 0.65);
  padding: 64px 0 32px;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 32px;
}
.footer__brand .brand {
  color: #fff;
  margin-bottom: 14px;
}
.footer__brand p {
  font-size: var(--text-body);
  max-width: 280px;
  line-height: var(--leading-body);
}
.footer__col h4 {
  color: #fff;
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  margin-bottom: 16px;
}
.footer__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer__col li {
  margin: 10px 0;
}
.footer__col a {
  font-size: var(--text-body);
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.15s ease;
}
.footer__col a:hover {
  color: #fff;
}
.footer__bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.45);
}
.footer__bottom a {
  color: rgba(255, 255, 255, 0.6);
}

/* ---------------------------------------------------------------- reveal
   渐进增强：默认内容可见。仅当 JS 确认运行（html.js-on）时才先隐藏再动画，
   保证 JS 报错 / 被禁用时内容始终可见，不会出现整屏空白。 */
.reveal {
  opacity: 1;
  transform: none;
}
.js-on .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.js-on .reveal.is-in {
  opacity: 1;
  transform: none;
}

/* Opaque fallback — reduced-transparency / no backdrop-filter support.
   All Liquid Glass approximation surfaces get solid fills. */
html[data-transparency="opaque"] .nav,
html[data-transparency="opaque"] .trust,
html[data-transparency="opaque"] .hero__pill,
html[data-transparency="opaque"] .mock,
html[data-transparency="opaque"] .mock__bar,
html[data-transparency="opaque"] .mock__result span,
html[data-transparency="opaque"] .feature,
html[data-transparency="opaque"] .pricing-card {
  background: var(--surface-solid);
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  border-color: var(--separator);
  box-shadow: var(--shadow-sm);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .nav,
  .trust,
  .hero__pill,
  .mock,
  .mock__bar,
  .mock__result span,
  .feature,
  .pricing-card {
    background: var(--surface-solid);
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    border-color: var(--separator);
    box-shadow: var(--shadow-sm);
  }
}

/* ---------------------------------------------------------------- pricing */
.pricing-wrap {
  display: flex;
  justify-content: center;
  margin-top: 8px;
}
.pricing-card {
  max-width: 560px;
  width: 100%;
  padding: 40px 44px;
  border-radius: var(--r-xl);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.72);
  box-shadow:
    var(--shadow-md),
    0 0 0 1px rgba(82, 148, 255, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(28px) saturate(170%);
  -webkit-backdrop-filter: blur(28px) saturate(170%);
  text-align: center;
}
.pricing-card__tag {
  display: inline-block;
  font-size: var(--text-title-sm);
  font-weight: var(--weight-bold);
  color: var(--tw-accent-deep);
  background: var(--tw-accent-soft);
  padding: 6px 20px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.pricing-card__desc {
  font-size: var(--text-body-lg);
  color: var(--ink-soft);
  line-height: var(--leading-body);
  margin-bottom: 28px;
}
.pricing-list {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  text-align: left;
}
.pricing-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: var(--text-body-lg);
  border-top: 1px solid var(--separator);
}
.pricing-list li:first-child {
  border-top: none;
}
.pi-check {
  flex-shrink: 0;
  font-weight: var(--weight-bold);
  color: var(--tw-accent-deep);
}
.pricing-hint {
  margin-top: 16px;
  font-size: var(--text-sm);
  color: var(--ink-muted);
}

/* --------------------------------------------------------------------- faq */
.faq-list {
  margin-top: 8px;
}
.faq-list .acc {
  margin-top: 8px;
}
.faq-list .acc:first-child {
  margin-top: 0;
}

/* ------------------------------------------------------------ responsive */
@media (max-width: 960px) {
  :root {
    --type-hero: 48px;
    --type-section-title: var(--text-display-sm);
  }
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .mock {
    transform: none;
    max-width: 480px;
  }
  .feature-grid,
  .scenario-grid,
  .value-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature--wide {
    grid-column: span 2;
    grid-template-columns: 1fr;
  }
  .footer__top {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 720px) {
  :root {
    --type-hero: 38px;
    --type-section-title: var(--text-display-sm);
    --type-compact-title: var(--text-title);
  }
  .section {
    padding: 64px 0;
  }
  .nav__links {
    display: none;
  }
  .nav__burger {
    display: block;
  }
  .nav__links.is-open {
    display: flex;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--surface-solid);
    border-bottom: 1px solid var(--separator);
    padding: 8px 0;
  }
  .nav__links.is-open li {
    padding: 12px 24px;
  }
  .feature-grid,
  .scenario-grid,
  .value-grid,
  .trust__row,
  .dl-latest {
    grid-template-columns: 1fr;
  }
  .feature--wide {
    grid-column: span 1;
  }
  .trust__row {
    grid-template-columns: 1fr 1fr;
    gap: 28px 16px;
  }
  .dl-cta {
    padding: 40px 24px;
  }
  .footer__top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .hist-row__dls {
    margin-left: 0;
    width: 100%;
  }
  /* 移动端 hero mock 上下堆叠，避免两列挤压 */
  .mock__body {
    grid-template-columns: 1fr;
  }
  .mock__result {
    min-height: 150px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

html[data-motion="reduce"] *,
html[data-motion="reduce"] {
  scroll-behavior: auto !important;
  transition: none !important;
  animation: none !important;
}

html[data-motion="reduce"] .reveal {
  opacity: 1;
  transform: none;
}

/* ================================================= Dark mode toggle button */
.nav__theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid rgba(60, 60, 67, 0.14);
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(12px) saturate(160%);
  cursor: pointer;
  color: var(--label);
  transition: background var(--dur-fast) ease, border-color var(--dur-fast) ease, transform var(--dur-fast) ease;
}
.nav__theme-toggle svg {
  width: 16px;
  height: 16px;
  pointer-events: none;
}
/* light: show moon (click to go dark); dark: show sun (click to go light) */
.nav__theme-toggle .icon-moon { display: block; }
.nav__theme-toggle .icon-sun  { display: none; }
html[data-theme="dark"] .nav__theme-toggle .icon-moon { display: none; }
html[data-theme="dark"] .nav__theme-toggle .icon-sun  { display: block; }
html[data-theme="dark"] .nav__theme-toggle {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(44, 44, 46, 0.72);
}
.nav__theme-toggle:hover {
  background: rgba(255, 255, 255, 0.90);
  border-color: rgba(52, 120, 246, 0.22);
  transform: scale(1.08);
}
html[data-theme="dark"] .nav__theme-toggle:hover {
  background: rgba(72, 72, 74, 0.92);
  border-color: rgba(144, 186, 255, 0.30);
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .nav__theme-toggle { background: var(--surface-solid); }
}

/* ==========================================================================
   Agent Store — download.html 专用样式
   ========================================================================== */

/* ── Store Hero ─────────────────────────────────────────────── */
.store-hero {
  padding: 76px 0 34px;
}
.store-hero .container {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(320px, 1.1fr);
  grid-template-rows: auto auto;
  gap: 40px;
  align-items: end;
}
.store-hero .eyebrow {
  display: inline-block;
  margin-bottom: 16px;
  padding: 4px 14px;
  border-radius: 99px;
  background: color-mix(in srgb, var(--tw-accent) 10%, transparent);
  color: var(--tw-accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  grid-column: 1;
  grid-row: 1;
  justify-self: start;
}
.store-hero .section-title {
  font-size: var(--type-section-title);
  line-height: 1.15;
  margin: 0;
  grid-column: 1;
  grid-row: 2;
}
.store-hero .section-sub {
  font-size: 17px;
  color: var(--ink-muted);
  line-height: 1.7;
  grid-column: 2;
  grid-row: 2;
  margin: 0 !important;
  max-width: 560px !important;
}

/* 状态条（登录后展示） */
.store-status-bar {
  grid-column: 1 / -1;
  margin: 24px auto 0;
  max-width: 480px;
  padding: 12px 20px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--tw-accent) 8%, var(--surface-elevated));
  border: 1px solid color-mix(in srgb, var(--tw-accent) 20%, transparent);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}
.store-status-bar .status-icon { font-size: 20px; }
.store-status-bar .status-text { flex: 1; text-align: left; }
.store-status-bar .status-action {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--tw-accent);
  font-size: 13px;
  text-decoration: underline;
  padding: 0;
}
/* pending 态 */
.store-status-bar.is-pending {
  background: color-mix(in srgb, #f59e0b 8%, var(--surface-elevated));
  border-color: color-mix(in srgb, #f59e0b 25%, transparent);
}
.store-status-bar.is-pending .status-icon::after { content: '⏳'; }
/* approved 态 */
.store-status-bar.is-approved .status-icon::after { content: '✓'; }

/* ── Filter Tabs ────────────────────────────────────────────── */
.store-tabs {
  display: flex;
  gap: 8px;
  padding: 22px 0 24px;
  flex-wrap: wrap;
}
.store-tab {
  padding: 8px 22px;
  border-radius: 99px;
  border: 1px solid var(--separator);
  background: var(--surface-elevated);
  color: var(--ink-muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--dur-fast) ease;
}
.store-tab:hover {
  border-color: var(--tw-accent);
  color: var(--tw-accent);
}
.store-tab.is-active {
  background: var(--tw-accent);
  border-color: var(--tw-accent);
  color: #fff;
}

/* ── App Grid ───────────────────────────────────────────────── */
.store-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 18px;
  padding-bottom: 64px;
  align-items: stretch;
}
.store-loading {
  grid-column: 1 / -1;
  padding: 60px 20px;
  text-align: center;
  color: var(--ink-muted);
  font-size: 15px;
}
.store-empty {
  grid-column: 1 / -1;
  padding: 60px 20px;
  text-align: center;
  color: var(--ink-muted);
  font-size: 15px;
}

/* ── App Card ───────────────────────────────────────────────── */
.app-card {
  background: var(--surface-elevated);
  border: 1px solid var(--separator);
  border-radius: 16px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 260px;
  transition: transform var(--dur-fast) ease, box-shadow var(--dur-fast) ease;
}
.app-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, .10);
}
html[data-theme="dark"] .app-card:hover {
  box-shadow: 0 8px 32px rgba(0, 0, 0, .35);
}

.app-card__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.app-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
  background: color-mix(in srgb, var(--tw-accent) 10%, var(--surface));
  border: 1px solid var(--separator);
}
.app-card__meta { flex: 1; min-width: 0; }
.app-card__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--label);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.app-card__version {
  font-size: 12px;
  color: var(--ink-muted);
  margin-top: 2px;
}

/* Tier badge */
.tier-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .03em;
  flex-shrink: 0;
}
.tier-badge--standard {
  background: color-mix(in srgb, #8e8e93 12%, transparent);
  color: #636366;
}
html[data-theme="dark"] .tier-badge--standard { color: #aeaeb2; }
.tier-badge--member {
  background: color-mix(in srgb, #007aff 12%, transparent);
  color: #0056cc;
}
html[data-theme="dark"] .tier-badge--member { color: #5faaff; }
.tier-badge--flagship {
  background: linear-gradient(135deg, rgba(255,214,0,.15), rgba(255,149,0,.15));
  color: #b06000;
  border: 1px solid rgba(255,149,0,.25);
}
html[data-theme="dark"] .tier-badge--flagship { color: #ffb340; border-color: rgba(255,149,0,.35); }

/* App desc */
.app-card__desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-muted);
  flex: 1;
  margin: 0;
}

.app-card__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12px;
  color: var(--ink-muted);
}
.app-card__stats span { display: flex; align-items: center; gap: 4px; }

.app-card__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: auto;
}
.app-card__actions--single { grid-template-columns: 1fr; }
.app-card__actions .btn { font-size: 13px; padding: 9px 12px; }
.app-card__actions .btn--dl {
  background: var(--tw-accent);
  color: #fff;
  border-color: var(--tw-accent);
}
.app-card__actions .btn--dl:hover { opacity: .88; }
.app-card__actions .btn--dl:disabled,
.app-card__actions .btn--dl.is-locked {
  background: var(--surface);
  color: var(--ink-muted);
  border-color: var(--separator);
  cursor: default;
  opacity: 1;
}
.btn--dl-single {
  width: 100%;
  grid-column: 1 / -1;
}

@media (max-width: 760px) {
  .store-hero {
    padding: 48px 0 22px;
  }
  .store-hero .container {
    display: block;
  }
  .store-hero .section-sub {
    margin-top: 14px;
    max-width: none !important;
  }
  .store-tabs {
    padding-top: 18px;
  }
  .store-tab {
    flex: 1 1 calc(50% - 8px);
    padding-inline: 12px;
  }
  .app-card {
    min-height: 0;
    padding: 18px;
  }
  .app-card__head {
    align-items: center;
  }
  .tier-badge {
    align-self: flex-start;
  }
}

/* ── Modal ──────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(0, 0, 0, .48);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  backdrop-filter: blur(4px);
}
.modal-overlay[hidden] { display: none; }

.modal {
  position: relative;
  background: var(--surface-elevated);
  border: 1px solid var(--separator);
  border-radius: 20px;
  padding: 32px;
  width: 100%;
  max-width: 420px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 72px rgba(0, 0, 0, .25);
}
html[data-theme="dark"] .modal {
  box-shadow: 0 24px 72px rgba(0, 0, 0, .55);
}

.modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: none;
  background: color-mix(in srgb, var(--separator) 60%, transparent);
  color: var(--ink-muted);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal__close:hover { background: var(--separator); color: var(--label); }

.modal__head { margin-bottom: 24px; }
.modal__title { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.modal__sub { font-size: 13px; color: var(--ink-muted); }

.modal__form { display: flex; flex-direction: column; gap: 16px; }

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field > span {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-secondary);
}
.field > span em { color: var(--tw-accent); font-style: normal; margin-left: 2px; }
.field input,
.field select {
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--separator);
  background: var(--surface);
  color: var(--label);
  font-size: 15px;
  outline: none;
  transition: border-color var(--dur-fast) ease;
}
.field input:focus,
.field select:focus { border-color: var(--tw-accent); }
.field input::placeholder { color: var(--ink-muted); }

.modal__switch {
  color: var(--ink-muted);
  font-size: 13px;
  margin: 10px 0 0;
  text-align: center;
}

.modal__switch-btn {
  background: none;
  border: none;
  color: var(--tw-accent);
  cursor: pointer;
  font-size: 13px;
  padding: 0;
  text-decoration: underline;
}

.captcha-row {
  align-items: center;
  display: flex;
  gap: 10px;
}

.captcha-input {
  flex: 1;
  font-family: ui-monospace, monospace;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.captcha-hint {
  color: var(--ink-muted);
  font-size: 11px;
  margin-top: 2px;
}

.modal__tip {
  font-size: 13px;
  margin: 0;
  padding: 8px 12px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--tw-accent) 8%, transparent);
}

/* 成功态 */
.modal__success {
  text-align: center;
  padding: 8px 0;
}
.modal__success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: color-mix(in srgb, #34c759 15%, transparent);
  color: #34c759;
  font-size: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.modal__success h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.modal__success p { font-size: 14px; color: var(--ink-muted); margin: 0 0 8px; }
.modal__success-note {
  color: var(--ink-muted);
  font-size: 13px;
  margin-top: 16px;
}
.modal__reg-id {
  display: block;
  padding: 10px 16px;
  background: var(--surface);
  border: 1px solid var(--separator);
  border-radius: 8px;
  font-family: ui-monospace, monospace;
  font-size: 14px;
  word-break: break-all;
  color: var(--label);
  margin: 8px 0;
}

.modal__token {
  display: grid;
  gap: 14px;
}

.modal__token[hidden] {
  display: none;
}

.modal__token-kicker {
  color: var(--tw-accent);
  font-size: 13px;
  font-weight: 700;
  margin: 0;
}

.modal__token h3 {
  color: var(--label);
  font-size: 20px;
  font-weight: 700;
  margin: 0;
}

.modal__token p {
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

.modal__token code {
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid var(--separator);
  border-radius: 8px;
  color: var(--label);
  display: block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.6;
  overflow-wrap: anywhere;
  padding: 12px;
}

.modal__token-actions {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 560px) {
  .modal__token-actions {
    grid-template-columns: 1fr;
  }
}

/* ── 登录后客服浮窗 ─────────────────────────────────────────── */
.support-widget {
  bottom: max(28px, env(safe-area-inset-bottom));
  display: block;
  position: fixed;
  right: max(28px, env(safe-area-inset-right));
  z-index: 80;
}

.support-widget[hidden] {
  display: none;
}

.support-widget__launcher {
  align-items: center;
  background: var(--tw-accent);
  border: 1px solid color-mix(in srgb, var(--tw-accent) 65%, #fff);
  border-radius: 8px;
  box-shadow: 0 18px 42px rgba(255, 149, 0, 0.28);
  color: #fff;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  font-size: 15px;
  font-weight: 700;
  gap: 2px;
  height: 92px;
  justify-content: center;
  line-height: 1.25;
  min-width: 112px;
  padding: 14px 18px;
}

.support-widget__launcher strong {
  font-size: 14px;
  font-weight: 700;
}

.support-widget__panel {
  background: color-mix(in srgb, var(--surface-elevated) 94%, transparent);
  border: 1px solid var(--separator);
  border-radius: 14px;
  bottom: 108px;
  box-shadow: var(--shadow-lg);
  display: grid;
  gap: 12px;
  max-height: min(640px, calc(100vh - 160px));
  padding: 16px;
  position: absolute;
  right: 0;
  width: min(360px, calc(100vw - 32px));
}

.support-widget__panel[hidden] {
  display: none;
}

.support-widget__head {
  align-items: start;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.support-widget__head h2 {
  color: var(--label);
  font-size: 17px;
  font-weight: 700;
  margin: 0;
}

.support-widget__head p {
  color: var(--ink-muted);
  font-size: 12px;
  margin: 2px 0 0;
}

.support-widget__close {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--separator);
  border-radius: 999px;
  color: var(--ink-muted);
  cursor: pointer;
  display: flex;
  font-size: 18px;
  height: 30px;
  justify-content: center;
  line-height: 1;
  width: 30px;
}

.support-widget__messages {
  border: 1px solid var(--separator);
  border-radius: 10px;
  display: grid;
  gap: 10px;
  max-height: 250px;
  min-height: 130px;
  overflow-y: auto;
  padding: 12px;
}

.support-widget__empty {
  align-self: center;
  color: var(--ink-muted);
  font-size: 13px;
  justify-self: center;
  margin: 0;
}

.support-widget__message {
  display: grid;
  gap: 4px;
}

.support-widget__message span {
  color: var(--ink-muted);
  font-size: 11px;
}

.support-widget__message p {
  border-radius: 10px;
  color: var(--label);
  font-size: 13px;
  line-height: 1.55;
  margin: 0;
  overflow-wrap: anywhere;
  padding: 9px 10px;
}

.support-widget__message--user {
  justify-items: end;
}

.support-widget__message--user p {
  background: color-mix(in srgb, var(--tw-accent) 18%, transparent);
}

.support-widget__message--admin {
  justify-items: start;
}

.support-widget__message--admin p {
  background: var(--surface);
  border: 1px solid var(--separator);
}

.support-widget__form {
  display: grid;
  gap: 10px;
}

.support-widget__field {
  display: grid;
  gap: 6px;
}

.support-widget__field span {
  color: var(--ink-secondary);
  font-size: 12px;
  font-weight: 600;
}

.support-widget__field textarea {
  background: var(--surface);
  border: 1px solid var(--separator);
  border-radius: 10px;
  color: var(--label);
  font: inherit;
  min-height: 82px;
  outline: none;
  padding: 10px 12px;
  resize: vertical;
}

.support-widget__field textarea:focus {
  border-color: var(--tw-accent);
}

.support-widget__actions {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr;
}

.support-widget__error {
  background: color-mix(in srgb, var(--tw-accent) 9%, transparent);
  border-radius: 8px;
  color: var(--tw-accent);
  font-size: 12px;
  margin: 0;
  padding: 8px 10px;
}

@media (max-width: 640px) {
  .support-widget {
    bottom: max(18px, env(safe-area-inset-bottom));
    right: 16px;
  }

  .support-widget__launcher {
    height: 76px;
    min-width: 96px;
    padding: 12px 14px;
  }

  .support-widget__panel {
    bottom: 92px;
    max-height: calc(100vh - 128px);
  }
}

/* ── FAQ ────────────────────────────────────────────────────── */
.section--tight { padding: 64px 0; }
.surface-band { background: var(--surface-elevated); }

.section-head--compact { margin-bottom: 32px; }
.section-title--compact {
  font-size: var(--type-compact-title);
  font-weight: 700;
  color: var(--label);
}

.faq-list { display: flex; flex-direction: column; gap: 12px; }
.acc {
  border: 1px solid var(--separator);
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface);
}
.acc summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--label);
  user-select: none;
}
.acc summary::-webkit-details-marker { display: none; }
.acc summary::after {
  content: '+';
  font-size: 20px;
  font-weight: 300;
  color: var(--ink-muted);
  transition: transform var(--dur-fast) ease;
}
.acc[open] summary::after { transform: rotate(45deg); }
.acc__body {
  padding: 4px 20px 20px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-secondary);
}
.acc__body p, .acc__body ul { margin: 0; }
.acc__body ul { padding-left: 20px; }
.acc__body li + li { margin-top: 6px; }

/* ── btn extensions ─────────────────────────────────────────── */
.btn--lg { padding: 13px 24px; font-size: 16px; }
.btn--accent {
  background: var(--tw-accent);
  border-color: var(--tw-accent);
  color: #fff;
}
.btn--accent:hover { opacity: .88; }